Acoustic measurements were carried out in the engine intake ducts of a Fokker F28 aircraft during flight. One of the two tail-mounted, low-by-pass ratio engines having a hard-walled intake was instrumented to determine the amplitudes of the circumferential modes which constitute the sound field. In other engine the impedance of the inlet acoustic liner was measured with the 'two-microphone technique'. In addition, some aerodynamic measurements were carried out to determine the flow conditions at the wall of the intake duct.


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    Title :

    In-Flight Acoustic Measurements in the Engine Intake of a Fokker F28 Aircraft


    Contributors:
    T. Zandbergen (author) / J. N. Laan (author) / H. J. Zeemans (author) / S. L. Sarin (author)

    Publication date :

    1983


    Size :

    18 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    In-flight acoustic measurements in the engine intake of a Fokker F28aircraft

    ZANDBERGEN, T. / LAAN, J. / ZEEMANS, H. et al. | AIAA | 1983


    In-Flight Acoustic Mode Measurements in the Turbofan Engine Inlet of Fokker 100 Aircraft

    Sarin, S. L. / Rademaker, E. R. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 1993